Self-hosted, lightweight server and website monitoring and O&M tool
The Network UPS Tools repository
A suite of Monitoring Plugins (formerly known as nagios-plugins)
Floating window used to display current network speed, CPU & memory
A utility to safely generate malicious network traffic patterns
The Active Monitoring System
Lightweight network IP scanner
Monitor temperature sensors, fan speed, voltage, load & clock speeds
Application to comfortably monitor your Internet traffic
Community-based GPL-licensed network monitoring system
An eye on your system
Open source monitoring system and time series database
Open-source systems performance monitor
The open source time series database
Raspberry Pi config for all things Internet
BGP and RPKI monitoring tool
Zeek is a powerful network analysis framework
A distributed and high-performance monitoring system
Enterprise-Grade Open-Source Network Management Platform
Apache HertzBeat(incubating) is a real-time monitoring system
pg_activity is a top like application for PostgreSQL server activity
Monitorix is a free, open source, lightweight system monitoring tool
The core of our monitoring platform
A simple program to monitor your network/data usage
Scapy is a Python-based interactive packet manipulation program